# -*- coding: utf-8 -*-
from odoo import models, fields, api, _

class GarmentFinishedGoods(models.Model):
    _name = 'garment.finished.goods'
    _description = 'Finished Goods Inventory by Variant (Style + Color + Size)'
    _order = 'style_id, color_id, size_id'

    style_id = fields.Many2one('garment.style', string='Garment Style', required=True, index=True)
    color_id = fields.Many2one('garment.color', string='Color', required=True, index=True)
    size_id = fields.Many2one('garment.size', string='Size', required=True, index=True)
    sku = fields.Char(string='Variant SKU', compute='_compute_sku', store=True, index=True)
    
    product_id = fields.Many2one('product.product', string='Odoo Variant Product')
    location_id = fields.Many2one('stock.location', string='Warehouse Stock Location')
    
    on_hand_qty = fields.Integer(string='On Hand Pieces', default=0)
    reserved_qty = fields.Integer(string='Reserved Pieces', default=0)
    available_qty = fields.Integer(string='Available to Ship', compute='_compute_available_qty', store=True)
    shipped_qty = fields.Integer(string='Total Shipped Pieces', default=0)

    _variant_uniq = models.Constraint('UNIQUE(style_id, color_id, size_id)', 'Finished Goods variant record already exists!')

    @api.depends('style_id', 'color_id', 'size_id')
    def _compute_sku(self):
        for rec in self:
            s_name = rec.style_id.name if rec.style_id else 'STYLE'
            c_code = rec.color_id.code if rec.color_id else 'CLR'
            sz_code = rec.size_id.code if rec.size_id else 'SZ'
            rec.sku = f"{s_name}-{c_code}-{sz_code}"

    @api.depends('on_hand_qty', 'reserved_qty')
    def _compute_available_qty(self):
        for rec in self:
            rec.available_qty = max(0, rec.on_hand_qty - rec.reserved_qty)